s = str(input('введите строку'))
f = s
for i in s:
    if i in 'qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM1234567890!@#$%^&*_-+=,.':
        s = s.replace(i,'')
for i in range (len(s)):
        s = s.replace(' ', '')
        s = s.replace('()', '')
        s = s.replace('{}', '')
        s = s.replace('<>', '')
if len(s) == 0:
    print('true', f)
else:
    print('false', s)